Single and low-lying states dominance in two-neutrino double-beta decay

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dc.creatorMoreno, O.
dc.creatorAlvarez-Rodriguez, R.
dc.creatorSarriguren, P.
dc.creatorde Guerra, E. Moya
dc.creatorSimkovic, F.
dc.creatorFaessler, A.
dc.date2008-11-03
dc.date.accessioned2026-07-07T12:39:13Z
dc.date.available2026-07-07T12:39:13Z
dc.descriptionA theoretical analysis of the single-state dominance hypothesis for the two-neutrino double-beta decay rates is performed on the examples of the double-beta decays of 100Mo, 116Cd, and 128Te. We also test the validity of an extended low-lying-state dominance that takes into account the contributions of the low-lying excited states in the intermediate nucleus to the double-beta decay rates. This study has been accomplished for all the double-beta emitters for which we have experimental information on their half-lives. The theoretical framework is a proton-neutron quasiparticle random-phase approximation based on a deformed Skyrme Hartree-Fock mean field with pairing correlations. Our calculations indicate that there are not clear evidences for single- or low-lying-state dominance in the two-neutrino double-beta decay. Finally, we investigate the single electron energy distributions of the outgoing electrons in the double-beta decay processes with an exact treatment of the energy denominators, which could help to a more comprehensive analysis of NEMO-3 data.
dc.description19 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/0811.0319
dc.identifierhttp://arxiv.org/abs/0811.0319
dc.identifierJ.Phys.G36:015106,2009
dc.identifierdoi:10.1088/0954-3899/36/1/015106
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219031
dc.subjectNuclear Theory
dc.titleSingle and low-lying states dominance in two-neutrino double-beta decay
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